Wijayatunga Mudalige Harischandra Wijayatunga (Sinhala: ???????? ??????? ???????????? ????????; born 25 October 1931) is a Sri Lankan author, translator, lexicographer, teacher, lawyer and politician.
He held various offices in different institutions of the Government of Sri Lanka.
At present he is the leader of Sinhalaye Mahasammatha Bhoomiputra Party.
During the presidential elections of 1994 and 1999, he was the candidate of that party for this high office.
He is the compiler of the Practical Sinhala Dictionary (1982) and Gunasena Great Sinhala Dictionary, which are considered as the most comprehensive Sinhala-Sinhala dictionaries to date.
Besides compiling these voluminous works of over 2000 pages, he also proposed scientific ideas to standardise Sinhala script.
His political philosophy Mahasammatavada ('Great Consensus' or comprehensive consultation) envisages consulting all people which he described "as going beyond democracy".
He has also appeared for the rights of Sinhalese Buddhists on various fora.